/// 控制台输出颜色
module.exports = function (color, n) {
    var styles = {
        'bold'          : ['\x1B[1m', '\x1B[22m'],
        'italic'        : ['\x1B[3m', '\x1B[23m'],
        'underline'     : ['\x1B[4m', '\x1B[24m'],
        'inverse'       : ['\x1B[7m', '\x1B[27m'],
        'strikethrough' : ['\x1B[9m', '\x1B[29m'],
        'white'         : ['\x1B[37m', '\x1B[39m'],
        'grey'          : ['\x1B[90m', '\x1B[39m'],
        'black'         : ['\x1B[30m', '\x1B[39m'],
        'blue'          : ['\x1B[34m', '\x1B[39m'],
        'cyan'          : ['\x1B[36m', '\x1B[39m'],
        'green'         : ['\x1B[32m', '\x1B[39m'],
        'magenta'       : ['\x1B[35m', '\x1B[39m'],
        'red'           : ['\x1B[31m', '\x1B[39m'],
        'yellow'        : ['\x1B[33m', '\x1B[39m'],
        'whiteBG'       : ['\x1B[47m', '\x1B[49m'],
        'greyBG'        : ['\x1B[49;5;8m', '\x1B[49m'],
        'blackBG'       : ['\x1B[40m', '\x1B[49m'],
        'blueBG'        : ['\x1B[44m', '\x1B[49m'],
        'cyanBG'        : ['\x1B[46m', '\x1B[49m'],
        'greenBG'       : ['\x1B[42m', '\x1B[49m'],
        'magentaBG'     : ['\x1B[45m', '\x1B[49m'],
        'redBG'         : ['\x1B[41m', '\x1B[49m'],
        'yellowBG'      : ['\x1B[43m', '\x1B[49m']
    };
    var n = n || 1;
    var s = '';
    for (var i = 0; i < n; i++) { 
        s += '%s ';
    }
    if (color) {
        return styles[color].join(s.trim());
    } else { 
        return '%s';
    }
    
}
